Fixed - Bug with setting values via attribute-style setters.
0.12.7
Added - Hook for calling value finalization in signature for `OrdAttMap`'s `__setitem__` implementation
0.12.6
Added - Hook in value storage finalization for use of the key, not just the value
0.12.5
Changed - By default, represent empty `Mapping` value as `null` in YAML rendition. Fixed - Expand paths (in `PathExAttMap`) for text values stored and fetched with attribute` syntax or `.get`.
0.12.4
Fixed - Avoid infinite recursion when an `EchoAttMap` subtype calls up to the superclass constructor: [Issue 55](https://github.com/pepkit/attmap/issues/55).
0.12.3
Changed - `PathExAttMap` now decleares itself as lower type bound.